$\int\left(\frac{t^3+3t}{t^2-1}\right)dx$

$\lim_{x\to\infty}\left(\sin\left(\frac{1}{x}\right)\cdot\cos\left(x\right)\right)$

$\left(4y^{-\frac{1}{2}}-\frac{5}{7}x^{-6}\right)^2$

$\int\frac{\left(6\right)}{\left(9x^2+1\right)^2}dx$

$\left(-63\right)\cdot\left(-43\right)$

$\frac{x^3}{x}\frac{-8}{-2}$

$x-4\cdot6x+11$